Automobile air conditioning system

ABSTRACT

An air conditioning system for a Dasher or Audi-Fox automobile wherein a compressor is mounted on a bracket bolted to tapped holes in the right side of the engine block.

This invention relates generally to an air conditioning system for a1973-74 Audi-Fox or a 1974 Dasher automobile. Space for non-factoryinstalled equipment, and especially the components of an airconditioning system, is at a premium in automobiles of this type.Therefore, difficulties are encountered in installing such componentswithout considerable alteration of existing parts of the automobileand/or use of extensive mounting parts, all of which add to the cost ofinstallation.

An object of this invention is to provide such a system in which thecompressor is mounted in a readily accessible area by means of a bracketconnected to the engine block by existing tapped holes.

Yet another object is to provide such a system in which the bracket isfirmly braced with a minimum number of additional parts or alteration ofexisting parts of the automobile.

A further object is to provide such a bracket which is of relativelyinexpensive construction and easy to install, and further whichfacilitates adjustment of the position of the compressor for adjustingtension in the belt driving the compressor.

In the drawings, wherein like reference characters are used throughoutto designate like parts:

FIG. 1 is a perspective view of the front end of a 1973-74 Audi Fox or1974 Dasher automobile, shown in phantom and with the components of anair conditioning system constructed in accordance with the presentinvention shown in solid lines in approximately the positions theyoccupy when installed therein;

FIG. 2 is a perspective view of the front of the passenger compartmentof the automobile, showing in broken lines the evaporator assembly ofthe air conditioning system and the hoses which connect it to ducts inthe dash;

FIG. 3 is a diagrammatic illustration of the right side of the engineblock of the automobile, looking up and to the right, showing in brokenlines the bracket for mounting the compressor thereon and the rod forbracing the bracket;

FIG. 4 is a perspective view of the bracket and bracing rod, as seenfrom the bottom and right and front end thereof, and showing thecompressor in broken lines; and

FIG. 5 is an exploded view of the bracket and compressor, as seen fromthe top and left side thereof.

With reference now to the details of the abovedescribed drawings, the1973-74 Audi-Fox or 1974 Dasher automobile shown in FIG. 1, anddesignated in its entirety by reference character 20, has its enginemounted beneath a hood in the front, and a radiator mounted on its leftside (with respect to the forward direction of movement of theautomobile) behind a ventilated grill across the front end of theengine. Air is admitted to a housing 21 within the passenger compartmentthrough an inlet 21a beneath the hood but above a horizontal bottom wallof the dash, which, as best shown at 22 in FIG. 2, extends laterallyacross the front of the passenger compartment. As also shown in FIG. 2,there is a center panel 26 beneath the dash, and a glove compartment 27beneath the dash intermediate the center panel 26 and the right sidewall of the automobile.

The components of the air conditioning system include a condenser 28mounted behind a ventilated grill on the front face of the radiator ofthe automobile, a compressor 29 mounted on the right side of the engineblock of the automobile, and an evaporator assembly 30 including ahousing containing a coil 31 mounted entirely within the passengercompartment between the housing 21 and the right side wall of theautomobile behind the glove compartment 27. As indicated in FIG. 1, andas well known in the art, these as well as other components of the airconditioning system are fluidly connected by hoses to permit arefrigerant to be circulated therethrough, so that cooled air from theevaporator may be circulated into the passenger compartment throughducts 23, 24 and 25 in the dash. As shown in FIG. 1, the compressor 29is operated by a pulley 32 connecting a sheave 33 on its front side witha sheave 34 driven by crank shaft 35 of the automobile.

As shown in FIGS. 3 to 5, compressor 29 is mounted on a bracket 100adapted to be connected to the right side wall 101 of the engine blockof the automobile above the oil pan 102 and forwardly of flywheelhousing 103 connected to a rear wall of the engine block. As previouslydescribed, and as shown in FIG. 3, there are four existing tapped holes104 in the forward portion of the side wall 101, in an area generallybeneath the air cleaner (not shown). These tapped holes are arranged ina generally rectangular pattern, with the upper and lower pairs beingformed in portions of the side wall of the engine block which areparallel but laterally offset with respect to one another. Moreparticularly, both walls are generally vertical, with the lower portionbeing disposed somewhat outwardly of the upper portion. As will bedescribed below, upon removal of the air cleaner, the area adjacentthese tapped holes is accessible for installation of the mountingbracket in position to support the compressor 29 with its sheave 33laterally aligned with sheave 34 to receive the pulley 32, as describedin connection with FIG. 1.

Bracket 100 includes a base plate 105 which is flat and generallyrectangular in shape and, upon mounting of the bracket, with its flattop side supporting the bottom side of the compressor. Moreparticularly, the base plate is provided with slots 106 extendinglongitudinally thereof, and thus generally laterally of the automobilewhen the bracket is connected thereto. The bracket is so mounted bymounting means which includes first and second mounting plates 107 and108, respectively, connected by an intermediate plate 109. As shown, themounting plates are disposed in planes which are parallel but spacedfrom one another, and which extend at an acute angle with respect to theupper side of the base plate 105.

More particularly, the plates are spaced from one another a distancesubstantially equal to the spacing of the portions of the side wall 101of the engine block, and extend at angles substantially equal to thosewhich said wall portions form with respect to the horizontal. Thus, withthe plates 107 and 108 fitting adjacent the upper and lower portions ofthe side wall 101, respectively, the supporting surface of the baseplate 105 and thus the bottom side of the compressor are generallyhorizontal. Each of the plates 107 and 108 has a pair of holes 110formed therein, each for alignment with one of the tapped holes 104 inthe side wall of the engine block so as to receive mounting bolts (notshown). Rubber grommets 111 may be disposed between the adjacent sidesof the plates 107 and 108 and the side walls of the engine block so asto reduce vibration.

As shown, the intermediate plate 109 is bent upwardly and away from thebase plate 105, the upper mounting plate 107 is bent back toward thebase plate 105, and the lower mounting plate 108 is welded to the backside of the intermediate plate 109 for extension downwardly and awayfrom plate 105. Consequently, the compressor 29 is supported on a levelintermediate the upper and lower edges of the mounting means, but closerto the lower pair of holes 104 than the upper pair.

When so connected to the engine block, the bracket 100 is braced bymeans of a rod or arm 112 connected at one end to the base plate of thebracket and at its opposite end to the engine block. More particularly,a hole was formed in the base plate 105 near its outer, rear corner soas to receive a bolt 113 for connecting the forward end of the arm tothe bracket, and the opposite, rear end of the arm is connected to theengine block by means of a bolt 114 which extends through a bolt hole inthe lower right corner of the flywheel housing 103 to connect it to arearwardly facing wall of the engine block. Thus, the rear end of thearm 112 is connected to the engine block by means of an existing tappedhole in the block, although it may be necessary or desirable to replacethe bolt originally used for connecting the flywheel housing with alonger one.

The arm 112 is bent intermediate its ends, with its forward portionextending from the bracket between the frame of the automobile and thestarter motor. Thus, from its forward end to the bend, the forwardportion of the rod extends inwardly at a relatively small angle. The armbends inwardly to dispose its rearward portion at about 90° with respectto its forward portion. Thus, a plate 115 on its rearward end is adaptedto fit against the rearwardly facing side of the flywheel housing, witha hole 116 therein extending generally parallel to its forward portionto receive the bolt 114.

A bar 120 connected to the bottom side of the base plate 105 includes aportion 121 extending laterally of the base plate generally intermediateits ends and extending from generally the mid-portion thereof to itsforward edge. The bar also includes a longitudinally extending portion122 which extends from the inner end of portion 121 to connection withthe lower mounting plate 108. Thus, in addition to the function to bedescribed, the bar 120 provides an additional brace for the bracket,particularly in supporting the base plate from the mounting plate 108.

The laterally extending portion 121 of the bar 120 also serves tosupport plate 123 in position to receive an adjusting screw 124. Thecompressor 121 is connected to plate 123 by means of a bolt 125 topermit it to be adjusted endwise of the bracket, and thus permitadjustment of the tension in the belt or pulley connecting thecompressor with the crank shaft.

Thus, as shown, the adjusting plate 123 includes a horizontallyextending flange 126 adapted to be slidable against the bottom side ofthe mounting plate 105, and having a hole 127 formed therein to receivethe bolt 125, and a vertically extending plate 128 disposed on the innerside of the flange 121. The plate 128 has a threaded hole therein whichreceives the end of the adjusting screw 124, so that the adjusting screwmay be rotated for moving the compressor either toward or away from theright side of the engine block. During this adjustment, of course, notonly the bolt 125, but other bolts 130 extending through the other slots106 are loosened.

As shown in FIG. 5, the connecting of the base plate to the mountingmeans is further braced by an arm 130a extending between the corner ofthe base plate near bolt 113 and the upper rearward corner of mountingplate 107. The disposal of this arm on the rearward side of the baseplate provides a means to which an end of arm 112 may be connected, ifdesired.

From the foregoing it will be seen that this invention is one welladapted to attain all of the ends and objects hereinabove set forth,together with other advantages which are obvious and which are inherentto the apparatus.

It will be understood that certain features and subcombinations are ofutility and may be employed without reference to other features andsubcombinations. This is contemplated by and is within the scope of theclaims.

As many possible embodiments may be made of the invention withoutdeparting from the scope thereof, it is to be understood that all matterherein set forth or shown in the accompanying drawings is to beinterpreted as illustrative and not in a limiting sense.

The invention having been described, what is claimed is:
 1. In anautomobile having tapped holes in the right side of its engine block anda flywheel housing bolted to a rearwardly facing wall of the block; anair conditioning system including a compressor assembly comprising abracket secured to the engine block by bolts extending into at leastcertain of said tapped holes, a compressor mounted on the bracket, and arod having one end connected to the bracket and the other end connectedto the block by means of a bolt connecting the flywheel housing to therearwardly facing wall thereof.
 2. A system of the character defined inclaim 1, wherein said rod is bent intermediate its ends and has means onits other end of the rod providing a bolt hole therethrough extendinggenerally parallel to its one end.